Wireline back pressure valve conveyance with lubricator polished rod

Abstract

Wireline back pressure valve (BPV) conveyance with lubricator polished rod includes a wireline BPV, a lubricator polished rod and a hydraulic lubricator. The wireline BPV can regulate / isolate pressure of hydrocarbons flowed through a wellbore formed from an offshore platform through a subterranean zone beneath a seabed. The lubricator polished rod is coupled to the wireline BPV and can run the wireline BPV into the wellbore. The hydraulic lubricator is coupled to the lubricator polished rod and can apply hydraulic lubrication to the lubricator polished rod. The lubricator polished rod runs the wireline BPV into the wellbore in response to the hydraulic lubrication applied by the hydraulic lubricator.

Description

TECHNICAL FIELD

[0001] This disclosure relates to wellbore completions.BACKGROUND

[0002] An offshore platform (sometimes called by other names such as oil production platform, gas production platform, barge, etc.) is an offshore structure with facilities to extract and process hydrocarbons (e.g., petroleum, natural gas, combinations of them) that are entrapped in subterranean zones (e.g., a formation, a portion of a formation, multiple formations) beneath the seabed. The offshore platform can be fixed to the seabed or can float. The offshore platform includes wellbore completions to both form (i.e., drill) the wellbore and to produce the hydrocarbons from the formed wellbore. Some portions of the wellbore surface completions can reside on the offshore platform. Some portions (sub-surface completions) can extend below the offshore platforms and into the subterranean zones.

[0003] A production wellbore (i.e., a wellbore through which the hydrocarbons are produced) includes, among other equipment, a production tubing. Hydrocarbons from the subterranean zone flow through the production tubing to other equipment on the offshore platform. To control the pressure of the hydrocarbons flowing through the production tubing, back pressure valves are deployed.SUMMARY

[0004] This specification describes technologies relating to wireline back pressure valve conveyance with lubricator polished rod.

[0005] The details of one or more implementations of the subject matter described in this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG. 1 is schematic diagram of an example of an offshore platform deploying a wellbore completion as described in this disclosure.

[0007] FIGS. 2A and 2B are each a schematic diagram of an example of a hydraulic lubricator.

[0008] FIG. 2C is a schematic diagram of a component included in the hydraulic lubricator.

[0009] FIG. 3 is a schematic diagram of an example of the wellbore completion coupled to a Christmas tree.

[0010] FIG. 4 is a flowchart of an example of a process for deploying the wellbore completion.

[0011] Like reference numbers and designations in the various drawings indicate like elements.DETAILED DESCRIPTION

[0012] A wellbore completion is a collection of wellbore equipment used to control hydrocarbon production through a wellbore. The wellbore equipment can include downhole tubulars and other equipment used to control flow of hydrocarbons through the wellbore. A back pressure valve (BPV) is an example of equipment that is a part of a wellbore completion. The BPV is a type of check valve that is installed in one of the wellbore tubulars (tubing hanger) to isolate production tubing through which the hydrocarbons flow to the surface. The BPV isolates pressure downhole of the BPV while permitting fluid uphole of the BPV to be raised to the surface.

[0013] A Christmas tree is another example of a wellbore completion. The Christmas tree is a group of wellbore equipment installed at a top of a wellbore (i.e., on the surface at an entrance to the wellbore). The equipment that collectively form the Christmas tree also control fluid flow through the wellbore. Often, the Christmas tree at the top of the wellbore is coupled to well completion equipment within the wellbore. The Christmas tree can include a stack of valves.

[0014] One technique to install a BPV in an offshore wellbore is to make up a nipple-type wireline BPV, wireline BOP, lubricator and tool string (e.g., a tubular made up with well tools), and to rig the same on top of a Christmas tree. When installed above the Christmas tree, such a wireline conveyance is tall. The height of the conveyance can pose a challenge for limited space on the offshore platform. The height also poses challenges of the wireline setting depth and affects the accuracy of the depth measurement. Moreover, the conveyance is heavy. To support the additional weight, flange to flange connections are used to accommodate the bearing and bending of the conveyance. The excessive stresses on the conveyance can result in breaks and repeated make ups of the top flange connection of the Christmas tree. Excessive make ups can also risk leaks in the flange ring groove sealing area.

[0015] This disclosure describes techniques to convey a well completion into an offshore wellbore formed from an offshore platform. The well completion includes a BPV that is conveyed into the wellbore by utilizing a lubricator polished rod. The well completion described here has a lower height compared to the wireline conveyance described above. Consequently, the buckling capacity of the well completion is improved for the same pressure rating. The rig up for this well completion is simpler, occupies less space, uses less equipment and requires fewer personnel compared to the wireline conveyance described above. Implementing the well completion described here improves operational safety as well as time and cost efficiency.

[0016] FIG. 1 is schematic diagram of an example of an offshore platform deploying 100 a wellbore completion as described in this disclosure. The offshore platform 100 is deployed to drill a wellbore 102 from the seabed 104 through a subterranean zone 106 (e.g., a formation, a portion of a formation, multiple formations). The subterranean zone 106 includes hydrocarbon reservoirs in which hydrocarbons (e.g., petroleum, natural gas, combinations of them) are trapped. A wellbore completion 108 is deployed from the offshore platform 100 to the entrance of the wellbore 102 on the seabed 104. Some portions of the wellbore completion 108 reside on the offshore platform 100. Such portions include a Christmas tree 110. Some portions 112 of the wellbore completion reside above the Christmas tree 110.

[0017] FIGS. 2A and 2B is each a schematic diagram of an example of the wellbore completion portion 112. The wellbore completion portion 112 includes a BPV 202 configured to regulate / isolate pressure of hydrocarbons flowed from the wellbore 102 (FIG. 1). The wellbore completion portion 112 includes a lubricator polished rod 204 that is coupled to the BPV 202. The lubricator polished rod 204 is a tubular having an uphole end and a downhole end. The downhole end of the lubricator polished rod 204 is coupled to an uphole end of the BPV 202.

[0018] A hydraulic lubricator 206 is coupled to the lubricator polished rod 204. The hydraulic lubricator 206 is configured to apply hydraulic lubrication to the lubricator polished rod 204. The lubricator polished rod 204 runs the BPV 202 into the wellbore 102 in response to the hydraulic lubrication applied by the hydraulic lubricator 206. In some implementations, the hydraulic lubricator 206 functions with hydraulic pressure to stroke (i.e., extend and retract) the lubricator polished rod 204. Such an operation allows setting depth measurement to be more accurate compared to a wireline setting method.

[0019] The schematic diagram in FIG. 2B shows the hydraulic lubricator 206 with wireline crossover on bottom and quick connect adapter for a tree cap of the Christmas tree 110. The hydraulic lubricator 206 includes a lubricator cylinder 252. The lubricator polished rod 204 resides within the lubricator cylinder 252. The lubricator polished rod 204 works like a piston, and moves up and down within the lubricator cylinder 252. The hydraulic lubricator 206 includes an upper seal 254 and a lower seal 256 for hydraulic fluid. The hydraulic lubricator 206 also includes a tubing 258 for pressure up of the lubricator polished rod 204. Pressure applied through the tubing 258 allows the lubricator polished rod 204 to move down. When the lubricator polished rod 204 moves up, then the return hydraulic fluid can be taken by the tubing 258.

[0020] The hydraulic lubricator 206 also includes a seal 260 to isolate wellbore pressure not entering the hydraulic lubricator 206. The well completion portion 112 also includes a crossover adapter 210 for the lubricator polished rod 204. Details of the crossover adapter 210 are described with reference to FIG. 2C. The well completion portion 112 further includes a quick connect crossover adapter 264 with the coupling nut 212 to couple to the Christmas tree 110.

[0021] The hydraulic lubricator 206 includes a hydraulic fluid flow assembly to flow hydraulic fluid through the lubricator cylinder 252 to drive the lubricator polished rod 204. The hydraulic fluid flow assembly includes multiple hoses (e.g., hose 266a, hose 266b) to flow the hydraulic fluid into the lubricator cylinder 252. The hydraulic fluid can include hydraulic oil or similar fluid that can provide lubrication (i.e., reduce friction) and also be compatible with elastomer seals utilized in the hydraulic lubricator 206. The hydraulic fluid flow assembly includes two needle valve / pressure gauge combinations (e.g., combination 268a, combination 268b)-one per hose. The hydraulic fluid flow assembly also includes a pump tank 270, which serves as a reservoir for the hydraulic fluid. The pump tank 270 includes an opening 272, e.g., to fill up the hydraulic fluid. A pump 274 is connected to the pump tank 270 and is operable to flow the hydraulic fluid in the pump tank 270 through the multiple hoses. The pump 274 can be a hand pump or a pneumatic pump. A pump selector 276 connects the pump tank 270 to the needle valve / pressure gauge combinations. The pump selector 276 can be set to different positions. In these positions, the pump 274 can pump the hydraulic fluid from the pump tank 276 selectively through one of the needle valve / pressure gauge combinations and one of the hoses. Flowing the hydraulic fluid through one of the hoses can cause the polished rod 204 to be run downhole. Flowing the hydraulic fluid instead through the other hose can cause the polished rod 204 to be pulled uphole.

[0022] FIG. 2C is a schematic diagram of a component included in the hydraulic lubricator. The wellbore completion includes a crossover sub 210 configured to couple to and reside uphole of a locking sub 208 (described below). The crossover sub 210 is configured to couple and decouple the BPV 202 to and from, respectively, the wellbore completion. The locking sub 208 includes a sucker rod-type top in thread to couple the locking sub 208 to the BPV 202. The locking sub 208 includes a receiving portion 278 (e.g., an axial recessed opening in a housing) to receive the downhole end of the lubricator polished rod 204. The sub 208 also includes a connecting portion 280 (e.g., another axial recessed opening in the housing). The connecting portion 280 is at the axially opposite end compared to the receiving portion 280. The connecting portion 280 defines sucker rod-type box threads.

[0023] The crossover sub 210 is made up to the polished rod bottom connection to adapt and connect with the locking sub 208. The locking sub 208 includes a coupling portion 282, e.g., sucker rod pin type thread that complements the sucker rod-type box threads of the connecting portion 280 of the crossover sub 210. The locking sub 208 also includes a quick lock sub connection 284 to couple to a wireline running tool or a GS pulling tool. The result of the coupling is a BPV running and pulling tool for a standard wireline / slickline tool string configuration.

[0024] The wellbore completion includes an adapter 212 (e.g., a coupling nut) that is configured to couple the wellbore completion to the uphole end of the Christmas tree 110 (FIG. 3), e.g., by forming a threaded connection.

[0025] FIG. 3 is a schematic diagram of an example of the wellbore completion 108 coupled to the Christmas tree 110. The BPV 202, the locking sub 208 and the crossover sub 210 are inserted into the Christmas tree 110 through an uphole end of the Christmas tree 110. The adapter 212 couples to the crossover sub 210 at the uphole end of the Christmas tree 110 to form a fluidic and sealing connection between the wellbore completion 108 and the Christmas tree 110. The multiple valves of the hydraulic lubricator are fluidically coupled to the pump selector 276, which is implemented as a selector valve. The multiple hydraulic hoses connect different positions on the pump selector 276 to different valves of the hydraulic lubricator. The pump selector 276 has multiple operating positions, e.g., an install position, a neutral position and a retract position. Operating the pump selector 276 between the multiple operating positions causes hydraulic fluid to be flowed through the lubricated polished rod 204 (FIGS. 2A-2C). The hydraulic fluid causes the lubricated polished rod 204 to be extended or retracted within the wellbore 102 (FIG. 1) based on the operating positions of the pump selector 276. Such stroking of the lubricated polished rod 204 is continued until the BPV 202 (FIGS. 2A, 2B) is installed at a desired depth within the wellbore 102 (FIG. 1).

[0026] FIG. 4 is a flowchart of an example of a process 400 for deploying the wellbore completion, e.g., the wellbore completion 102. At 402, a wellbore (e.g., the wellbore 102) is formed from an offshore platform (e.g., the offshore platform 100) through a subterranean zone (e.g., the subterranean zone 106) beneath a seabed (e.g., the seabed 104). At 404, a lubricator polished rod (e.g., the lubricator polished rod 204) is coupled to a BPV (e.g., the BPV 202). The lubricator polished rod and the BPV form a wellbore completion. At 406, a hydraulic lubricator (e.g., the hydraulic lubricator 206) is coupled to the lubricator polished rod. At 408, the wellbore completion is run into the wellbore.EXAMPLES

[0027] Certain aspects of the subject matter described here can be implemented as a wellbore completion. The wellbore completion includes a wireline BPV, a lubricator polished rod and a hydraulic lubricator. The wireline BPV can regulate or isolate pressure of hydrocarbons flowed through a wellbore formed from an offshore platform through a subterranean zone beneath a seabed. The lubricator polished rod is coupled to the wireline BPV and can run the wireline BPV into the wellbore. The hydraulic lubricator is coupled to the lubricator polished rod and can apply hydraulic lubrication to the lubricator polished rod. The lubricator polished rod runs the wireline BPV into the wellbore in response to the hydraulic lubrication applied by the hydraulic lubricator.

[0028] An aspect combinable with any other aspect can include the following features. The wireline BPV is at a downhole end of the well completion. The well completion includes a locking sub that can couple to and reside uphole of the wireline BPV. The locking sub can couple and decouple the wireline BPV to and from, respectively, the wellbore completion.

[0029] An aspect combinable with any other aspect can include the following features. The locking sub includes a sucker rod-type top pin thread to couple the locking sub to the wireline BPV.

[0030] An aspect combinable with any other aspect can include the following features. The wellbore completion further includes a crossover sub that can couple to and decouple the wireline BPV to and from, respectively, the wellbore completion.

[0031] An aspect combinable with any other aspect can include the following features. The wellbore completion includes a Christmas tree installed on the offshore platform at the entrance of the wellbore. The well completion includes an adapter connected to the Christmas tree to connect the hydraulic lubricator to the Christmas tree.

[0032] An aspect combinable with any other aspect can include the following features. The hydraulic lubricator includes multiple valves coupled to the adapter. The multiple valves can control flow of hydraulic fluid to move the lubricator polished rod in an uphole or a downhole direction.

[0033] An aspect combinable with any other aspect can include the following features. The multiple valves are coupled to a pump selector that can transition between different positions to control the flow of the hydraulic fluid through the multiple valves.

[0034] An aspect combinable with any other aspect can include the following features. The multiple valves are coupled to the selector valve by multiple hoses that can flow the hydraulic fluid.

[0035] Certain aspects of the subject matter described here can be implemented as a method. A wellbore is formed from an offshore platform through a subterranean zone beneath a seabed. A lubricator polished rod is coupled to a wireline back pressure valve. A hydraulic lubricator is coupled to the lubricator polished rod and the wireline BPV. The lubricator polished rod and the hydraulic lubricator form a well completion. The well completion is run into the wellbore.

[0036] An aspect combinable with any other aspect can include the following features. To run the well completion into the wellbore, the lubricator polished rod is stroked using the hydraulic lubricator.

[0037] An aspect combinable with any other aspect can include the following features. The wireline BPV is at a downhole end of the well completion. The wireline BPV is coupled to and decoupled from, respectively, the wireline BPV using a locking sub coupled to and residing uphole of the wireline BPV.

[0038] An aspect combinable with any other aspect can include the following features. The locking sub includes a sucker rod-type top pin thread. The locking sub is coupled to the wireline BPV using the sucker rod-type top pin thread.

[0039] An aspect combinable with any other aspect can include the following features. A Christmas tree is installed on the offshore platform at the entrance of the wellbore. The hydraulic lubricator is connected to the Christmas tree using an adapter.

[0040] An aspect combinable with any other aspect can include the following features. Hydraulic fluid is flowed using multiple valves controlled by a pump selector. The hydraulic fluid is flowed to move the lubricator polished rod in an uphole or in a downhole direction.

[0041] Thus, particular implementations of the subject matter have been described. Other implementations are within the scope of the following claims.

Examples

examples

[0027]Certain aspects of the subject matter described here can be implemented as a wellbore completion. The wellbore completion includes a wireline BPV, a lubricator polished rod and a hydraulic lubricator. The wireline BPV can regulate or isolate pressure of hydrocarbons flowed through a wellbore formed from an offshore platform through a subterranean zone beneath a seabed. The lubricator polished rod is coupled to the wireline BPV and can run the wireline BPV into the wellbore. The hydraulic lubricator is coupled to the lubricator polished rod and can apply hydraulic lubrication to the lubricator polished rod. The lubricator polished rod runs the wireline BPV into the wellbore in response to the hydraulic lubrication applied by the hydraulic lubricator.

[0028]An aspect combinable with any other aspect can include the following features. The wireline BPV is at a downhole end of the well completion. The well completion includes a locking sub that can couple to and reside uphole of th...

TECHNICAL FIELD

[0001] This disclosure relates to wellbore completions.BACKGROUND

[0002] An offshore platform (sometimes called by other names such as oil production platform, gas production platform, barge, etc.) is an offshore structure with facilities to extract and process hydrocarbons (e.g., petroleum, natural gas, combinations of them) that are entrapped in subterranean zones (e.g., a formation, a portion of a formation, multiple formations) beneath the seabed. The offshore platform can be fixed to the seabed or can float. The offshore platform includes wellbore completions to both form (i.e., drill) the wellbore and to produce the hydrocarbons from the formed wellbore. Some portions of the wellbore surface completions can reside on the offshore platform. Some portions (sub-surface completions) can extend below the offshore platforms and into the subterranean zones.

[0003] A production wellbore (i.e., a wellbore through which the hydrocarbons are produced) includes, among other equipment, a production tubing. Hydrocarbons from the subterranean zone flow through the production tubing to other equipment on the offshore platform. To control the pressure of the hydrocarbons flowing through the production tubing, back pressure valves are deployed.SUMMARY

[0004] This specification describes technologies relating to wireline back pressure valve conveyance with lubricator polished rod.

[0005] The details of one or more implementations of the subject matter described in this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG. 1 is schematic diagram of an example of an offshore platform deploying a wellbore completion as described in this disclosure.

[0007] FIGS. 2A and 2B are each a schematic diagram of an example of a hydraulic lubricator.

[0008] FIG. 2C is a schematic diagram of a component included in the hydraulic lubricator.

[0009] FIG. 3 is a schematic diagram of an example of the wellbore completion coupled to a Christmas tree.

[0010] FIG. 4 is a flowchart of an example of a process for deploying the wellbore completion.

[0011] Like reference numbers and designations in the various drawings indicate like elements.DETAILED DESCRIPTION

[0012] A wellbore completion is a collection of wellbore equipment used to control hydrocarbon production through a wellbore. The wellbore equipment can include downhole tubulars and other equipment used to control flow of hydrocarbons through the wellbore. A back pressure valve (BPV) is an example of equipment that is a part of a wellbore completion. The BPV is a type of check valve that is installed in one of the wellbore tubulars (tubing hanger) to isolate production tubing through which the hydrocarbons flow to the surface. The BPV isolates pressure downhole of the BPV while permitting fluid uphole of the BPV to be raised to the surface.

[0013] A Christmas tree is another example of a wellbore completion. The Christmas tree is a group of wellbore equipment installed at a top of a wellbore (i.e., on the surface at an entrance to the wellbore). The equipment that collectively form the Christmas tree also control fluid flow through the wellbore. Often, the Christmas tree at the top of the wellbore is coupled to well completion equipment within the wellbore. The Christmas tree can include a stack of valves.

[0014] One technique to install a BPV in an offshore wellbore is to make up a nipple-type wireline BPV, wireline BOP, lubricator and tool string (e.g., a tubular made up with well tools), and to rig the same on top of a Christmas tree. When installed above the Christmas tree, such a wireline conveyance is tall. The height of the conveyance can pose a challenge for limited space on the offshore platform. The height also poses challenges of the wireline setting depth and affects the accuracy of the depth measurement. Moreover, the conveyance is heavy. To support the additional weight, flange to flange connections are used to accommodate the bearing and bending of the conveyance. The excessive stresses on the conveyance can result in breaks and repeated make ups of the top flange connection of the Christmas tree. Excessive make ups can also risk leaks in the flange ring groove sealing area.

[0015] This disclosure describes techniques to convey a well completion into an offshore wellbore formed from an offshore platform. The well completion includes a BPV that is conveyed into the wellbore by utilizing a lubricator polished rod. The well completion described here has a lower height compared to the wireline conveyance described above. Consequently, the buckling capacity of the well completion is improved for the same pressure rating. The rig up for this well completion is simpler, occupies less space, uses less equipment and requires fewer personnel compared to the wireline conveyance described above. Implementing the well completion described here improves operational safety as well as time and cost efficiency.

[0016] FIG. 1 is schematic diagram of an example of an offshore platform deploying 100 a wellbore completion as described in this disclosure. The offshore platform 100 is deployed to drill a wellbore 102 from the seabed 104 through a subterranean zone 106 (e.g., a formation, a portion of a formation, multiple formations). The subterranean zone 106 includes hydrocarbon reservoirs in which hydrocarbons (e.g., petroleum, natural gas, combinations of them) are trapped. A wellbore completion 108 is deployed from the offshore platform 100 to the entrance of the wellbore 102 on the seabed 104. Some portions of the wellbore completion 108 reside on the offshore platform 100. Such portions include a Christmas tree 110. Some portions 112 of the wellbore completion reside above the Christmas tree 110.

[0017] FIGS. 2A and 2B is each a schematic diagram of an example of the wellbore completion portion 112. The wellbore completion portion 112 includes a BPV 202 configured to regulate / isolate pressure of hydrocarbons flowed from the wellbore 102 (FIG. 1). The wellbore completion portion 112 includes a lubricator polished rod 204 that is coupled to the BPV 202. The lubricator polished rod 204 is a tubular having an uphole end and a downhole end. The downhole end of the lubricator polished rod 204 is coupled to an uphole end of the BPV 202.

[0018] A hydraulic lubricator 206 is coupled to the lubricator polished rod 204. The hydraulic lubricator 206 is configured to apply hydraulic lubrication to the lubricator polished rod 204. The lubricator polished rod 204 runs the BPV 202 into the wellbore 102 in response to the hydraulic lubrication applied by the hydraulic lubricator 206. In some implementations, the hydraulic lubricator 206 functions with hydraulic pressure to stroke (i.e., extend and retract) the lubricator polished rod 204. Such an operation allows setting depth measurement to be more accurate compared to a wireline setting method.

[0019] The schematic diagram in FIG. 2B shows the hydraulic lubricator 206 with wireline crossover on bottom and quick connect adapter for a tree cap of the Christmas tree 110. The hydraulic lubricator 206 includes a lubricator cylinder 252. The lubricator polished rod 204 resides within the lubricator cylinder 252. The lubricator polished rod 204 works like a piston, and moves up and down within the lubricator cylinder 252. The hydraulic lubricator 206 includes an upper seal 254 and a lower seal 256 for hydraulic fluid. The hydraulic lubricator 206 also includes a tubing 258 for pressure up of the lubricator polished rod 204. Pressure applied through the tubing 258 allows the lubricator polished rod 204 to move down. When the lubricator polished rod 204 moves up, then the return hydraulic fluid can be taken by the tubing 258.

[0020] The hydraulic lubricator 206 also includes a seal 260 to isolate wellbore pressure not entering the hydraulic lubricator 206. The well completion portion 112 also includes a crossover adapter 210 for the lubricator polished rod 204. Details of the crossover adapter 210 are described with reference to FIG. 2C. The well completion portion 112 further includes a quick connect crossover adapter 264 with the coupling nut 212 to couple to the Christmas tree 110.

[0021] The hydraulic lubricator 206 includes a hydraulic fluid flow assembly to flow hydraulic fluid through the lubricator cylinder 252 to drive the lubricator polished rod 204. The hydraulic fluid flow assembly includes multiple hoses (e.g., hose 266a, hose 266b) to flow the hydraulic fluid into the lubricator cylinder 252. The hydraulic fluid can include hydraulic oil or similar fluid that can provide lubrication (i.e., reduce friction) and also be compatible with elastomer seals utilized in the hydraulic lubricator 206. The hydraulic fluid flow assembly includes two needle valve / pressure gauge combinations (e.g., combination 268a, combination 268b)-one per hose. The hydraulic fluid flow assembly also includes a pump tank 270, which serves as a reservoir for the hydraulic fluid. The pump tank 270 includes an opening 272, e.g., to fill up the hydraulic fluid. A pump 274 is connected to the pump tank 270 and is operable to flow the hydraulic fluid in the pump tank 270 through the multiple hoses. The pump 274 can be a hand pump or a pneumatic pump. A pump selector 276 connects the pump tank 270 to the needle valve / pressure gauge combinations. The pump selector 276 can be set to different positions. In these positions, the pump 274 can pump the hydraulic fluid from the pump tank 276 selectively through one of the needle valve / pressure gauge combinations and one of the hoses. Flowing the hydraulic fluid through one of the hoses can cause the polished rod 204 to be run downhole. Flowing the hydraulic fluid instead through the other hose can cause the polished rod 204 to be pulled uphole.

[0022] FIG. 2C is a schematic diagram of a component included in the hydraulic lubricator. The wellbore completion includes a crossover sub 210 configured to couple to and reside uphole of a locking sub 208 (described below). The crossover sub 210 is configured to couple and decouple the BPV 202 to and from, respectively, the wellbore completion. The locking sub 208 includes a sucker rod-type top in thread to couple the locking sub 208 to the BPV 202. The locking sub 208 includes a receiving portion 278 (e.g., an axial recessed opening in a housing) to receive the downhole end of the lubricator polished rod 204. The sub 208 also includes a connecting portion 280 (e.g., another axial recessed opening in the housing). The connecting portion 280 is at the axially opposite end compared to the receiving portion 280. The connecting portion 280 defines sucker rod-type box threads.

[0023] The crossover sub 210 is made up to the polished rod bottom connection to adapt and connect with the locking sub 208. The locking sub 208 includes a coupling portion 282, e.g., sucker rod pin type thread that complements the sucker rod-type box threads of the connecting portion 280 of the crossover sub 210. The locking sub 208 also includes a quick lock sub connection 284 to couple to a wireline running tool or a GS pulling tool. The result of the coupling is a BPV running and pulling tool for a standard wireline / slickline tool string configuration.

[0024] The wellbore completion includes an adapter 212 (e.g., a coupling nut) that is configured to couple the wellbore completion to the uphole end of the Christmas tree 110 (FIG. 3), e.g., by forming a threaded connection.

[0025] FIG. 3 is a schematic diagram of an example of the wellbore completion 108 coupled to the Christmas tree 110. The BPV 202, the locking sub 208 and the crossover sub 210 are inserted into the Christmas tree 110 through an uphole end of the Christmas tree 110. The adapter 212 couples to the crossover sub 210 at the uphole end of the Christmas tree 110 to form a fluidic and sealing connection between the wellbore completion 108 and the Christmas tree 110. The multiple valves of the hydraulic lubricator are fluidically coupled to the pump selector 276, which is implemented as a selector valve. The multiple hydraulic hoses connect different positions on the pump selector 276 to different valves of the hydraulic lubricator. The pump selector 276 has multiple operating positions, e.g., an install position, a neutral position and a retract position. Operating the pump selector 276 between the multiple operating positions causes hydraulic fluid to be flowed through the lubricated polished rod 204 (FIGS. 2A-2C). The hydraulic fluid causes the lubricated polished rod 204 to be extended or retracted within the wellbore 102 (FIG. 1) based on the operating positions of the pump selector 276. Such stroking of the lubricated polished rod 204 is continued until the BPV 202 (FIGS. 2A, 2B) is installed at a desired depth within the wellbore 102 (FIG. 1).

[0026] FIG. 4 is a flowchart of an example of a process 400 for deploying the wellbore completion, e.g., the wellbore completion 102. At 402, a wellbore (e.g., the wellbore 102) is formed from an offshore platform (e.g., the offshore platform 100) through a subterranean zone (e.g., the subterranean zone 106) beneath a seabed (e.g., the seabed 104). At 404, a lubricator polished rod (e.g., the lubricator polished rod 204) is coupled to a BPV (e.g., the BPV 202). The lubricator polished rod and the BPV form a wellbore completion. At 406, a hydraulic lubricator (e.g., the hydraulic lubricator 206) is coupled to the lubricator polished rod. At 408, the wellbore completion is run into the wellbore.EXAMPLES

[0027] Certain aspects of the subject matter described here can be implemented as a wellbore completion. The wellbore completion includes a wireline BPV, a lubricator polished rod and a hydraulic lubricator. The wireline BPV can regulate or isolate pressure of hydrocarbons flowed through a wellbore formed from an offshore platform through a subterranean zone beneath a seabed. The lubricator polished rod is coupled to the wireline BPV and can run the wireline BPV into the wellbore. The hydraulic lubricator is coupled to the lubricator polished rod and can apply hydraulic lubrication to the lubricator polished rod. The lubricator polished rod runs the wireline BPV into the wellbore in response to the hydraulic lubrication applied by the hydraulic lubricator.

[0028] An aspect combinable with any other aspect can include the following features. The wireline BPV is at a downhole end of the well completion. The well completion includes a locking sub that can couple to and reside uphole of the wireline BPV. The locking sub can couple and decouple the wireline BPV to and from, respectively, the wellbore completion.

[0029] An aspect combinable with any other aspect can include the following features. The locking sub includes a sucker rod-type top pin thread to couple the locking sub to the wireline BPV.

[0030] An aspect combinable with any other aspect can include the following features. The wellbore completion further includes a crossover sub that can couple to and decouple the wireline BPV to and from, respectively, the wellbore completion.

[0031] An aspect combinable with any other aspect can include the following features. The wellbore completion includes a Christmas tree installed on the offshore platform at the entrance of the wellbore. The well completion includes an adapter connected to the Christmas tree to connect the hydraulic lubricator to the Christmas tree.

[0032] An aspect combinable with any other aspect can include the following features. The hydraulic lubricator includes multiple valves coupled to the adapter. The multiple valves can control flow of hydraulic fluid to move the lubricator polished rod in an uphole or a downhole direction.

[0033] An aspect combinable with any other aspect can include the following features. The multiple valves are coupled to a pump selector that can transition between different positions to control the flow of the hydraulic fluid through the multiple valves.

[0034] An aspect combinable with any other aspect can include the following features. The multiple valves are coupled to the selector valve by multiple hoses that can flow the hydraulic fluid.

[0035] Certain aspects of the subject matter described here can be implemented as a method. A wellbore is formed from an offshore platform through a subterranean zone beneath a seabed. A lubricator polished rod is coupled to a wireline back pressure valve. A hydraulic lubricator is coupled to the lubricator polished rod and the wireline BPV. The lubricator polished rod and the hydraulic lubricator form a well completion. The well completion is run into the wellbore.

[0036] An aspect combinable with any other aspect can include the following features. To run the well completion into the wellbore, the lubricator polished rod is stroked using the hydraulic lubricator.

[0037] An aspect combinable with any other aspect can include the following features. The wireline BPV is at a downhole end of the well completion. The wireline BPV is coupled to and decoupled from, respectively, the wireline BPV using a locking sub coupled to and residing uphole of the wireline BPV.

[0038] An aspect combinable with any other aspect can include the following features. The locking sub includes a sucker rod-type top pin thread. The locking sub is coupled to the wireline BPV using the sucker rod-type top pin thread.

[0039] An aspect combinable with any other aspect can include the following features. A Christmas tree is installed on the offshore platform at the entrance of the wellbore. The hydraulic lubricator is connected to the Christmas tree using an adapter.

[0040] An aspect combinable with any other aspect can include the following features. Hydraulic fluid is flowed using multiple valves controlled by a pump selector. The hydraulic fluid is flowed to move the lubricator polished rod in an uphole or in a downhole direction.

[0041] Thus, particular implementations of the subject matter have been described. Other implementations are within the scope of the following claims.

Examples

examples

[0027]Certain aspects of the subject matter described here can be implemented as a wellbore completion. The wellbore completion includes a wireline BPV, a lubricator polished rod and a hydraulic lubricator. The wireline BPV can regulate or isolate pressure of hydrocarbons flowed through a wellbore formed from an offshore platform through a subterranean zone beneath a seabed. The lubricator polished rod is coupled to the wireline BPV and can run the wireline BPV into the wellbore. The hydraulic lubricator is coupled to the lubricator polished rod and can apply hydraulic lubrication to the lubricator polished rod. The lubricator polished rod runs the wireline BPV into the wellbore in response to the hydraulic lubrication applied by the hydraulic lubricator.

[0028]An aspect combinable with any other aspect can include the following features. The wireline BPV is at a downhole end of the well completion. The well completion includes a locking sub that can couple to and reside uphole of th...

Claims

1. A wellbore completion comprising:a wireline back pressure valve (BPV) configured to regulate or isolate pressure of hydrocarbons flowed through a wellbore formed from an offshore platform through a subterranean zone beneath a seabed;a lubricator polished rod coupled to the wireline BPV, the lubricator polished valve configured to run the wireline BPV into the wellbore;a hydraulic lubricator coupled to the lubricator polished rod, the hydraulic lubricator configured to apply hydraulic lubrication to the lubricator polished rod, wherein the lubricator polished rod runs the wireline BPV into the wellbore in response to the hydraulic lubrication applied by the hydraulic lubricator, wherein the wireline BPV is at a downhole end of the well completion;a locking sub configured to couple to and reside uphole of the wireline BPV, the locking sub configured to couple and decouple the wireline BPV to and from, respectively, the wellbore completion; anda crossover sub configured to couple to and reside uphole of the locking sub, the crossover sub configured to couple and decouple the wireline BPV to and from, respectively, the wellbore completion, wherein the crossover sub comprises a housing comprising a receiving portion defined by an axial recessed opening on one end of the housing, the receiving portion configured to receive a downhole end of the lubricator polished rod, and a connecting portion defined by another axial recessed opening on an opposite end of the housing, the connecting portion configured to couple to the locking sub.

2. (canceled)3. The well completion of claim 1, wherein the locking sub comprises a sucker rod-type top pin thread to couple the locking sub to the wireline BPV.

4. (canceled)5. The well completion of claim 1, wherein the crossover sub comprises a polished rod bottom connection configured to couple to an uphole end of the locking sub.

6. The well completion of claim 1, wherein a Christmas tree is installed on the offshore platform at the entrance of the wellbore, wherein the well completion further comprises an adapter connected to the Christmas tree to connect the hydraulic lubricator to the Christmas tree.

7. The well completion of claim 6, further comprising a plurality of valves coupled to the adapter, the plurality of valves configured to control flow of hydraulic fluid to move the lubricator polished rod in an uphole or a downhole direction.

8. The well completion of claim 7, wherein the plurality of valves are coupled to a pump selector configured to transition between different positions to control the flow of the hydraulic fluid through the plurality of valves.

9. The well completion of claim 8, wherein the plurality of valves are coupled to a selector valve by a plurality of hoses configured to flow the hydraulic fluid.

10. A method comprising:forming a wellbore from an offshore platform through a subterranean zone beneath a seabed;coupling a lubricator polished rod to a wireline back pressure valve;coupling a hydraulic lubricator to the lubricator polished rod and the wireline BPV, the lubricator polished rod and the hydraulic lubricator forming a well completion; andrunning the well completion into the wellbore, wherein the wireline BPV is at a downhole end of the well completion,wherein the method further comprises coupling and decoupling the wireline BPV to and from, respectively, the lubricator polished rod using a locking sub coupled to and residing uphole of the wireline BPV,wherein the method further comprises coupling and decoupling the locking sub to and from the lubricator polished rod using a crossover sub coupled to and residing uphole of the locking sub, the crossover sub coupling and decoupling the wireline BPV to and from, respectively, the wellbore completion, wherein the crossover sub comprises a housing comprising a receiving portion defined by an axial recessed opening on one end of the housing, the receiving portion configured to receive a downhole end of the lubricator polished rod, and a connecting portion defined by another axial recessed opening on an opposite end of the housing, the connecting portion configured to couple to the locking sub.

11. The method of claim 10, wherein running the well completion into the wellbore comprises stroking the lubricator polished rod using the hydraulic lubricator.

12. (canceled)13. The method of claim 10, wherein the locking sub comprises a sucker rod-type top pin thread, wherein the locking sub is coupled to the wireline BPV using the sucker rod-type top pin thread.

14. The method of claim 10, wherein a Christmas tree is installed on the offshore platform at the entrance of the wellbore, wherein the method further comprises connecting the hydraulic lubricator to the Christmas tree using an adapter.

15. The method of claim 14, further comprising flowing hydraulic fluid using a plurality of valves controlled by a pump selector, the hydraulic fluid flowed to move the lubricator polished rod in an uphole or in a downhole direction.

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